Return equal values between sets.

I have two vectors a and b of different lengths that contain integers. How can I return those values that belong in both a and b? Should I use ismember? ismember seems to return a vector of index numbers, but I could just that in a or b:

[tf, index] = ismember(a, b);
c = b(index);
c = a(index); %same?

Answer 1

[Wayne King]

How about intersect()?

x = 1:3;
y = 2:5;
[c,Ix,Iy] = intersect(x,y);

intersect() does not give repetitions though.

Wayne

[Leor Greenberger]

works perfectly.